What is the effect of aliasing on a digital oscilloscope when displaying a waveform?

Aliasing is an artifact that occurs in digital signal processing when a signal is sampled at a rate less than twice its highest frequency component, violating the Nyquist-Shannon sampling theorem. On a digital oscilloscope, this inadequate sampling rate causes the scope to connect the dots of the sampled data incorrectly. The result is a reconstructed waveform that looks like a false, jittery, lower-frequency version of the actual signal being measured. This is strictly a digital sampling error and has nothing to do with DC offset inaccuracies, vertical scale calibration, or screen blanking.